DE102004052210A1 - Compound multiplexer circuit e.g. for portable multi-band telephone, has multiplexer circuit equipped with matching network for extracting a frequency band - Google Patents

Abstract

A compound multiplexer circuit has a number of multiplexer circuits connected in parallel to allow multiplexing of a number of frequency bands, where at least one multiplexer circuit has a matching network (6) an inductor (L) and a capacitor (C), as well as a acoustic surface wave filter (SAW) (7) connected in series with the matching network (6), for extracting a frequency band. Independent claims are included for the following (1) (A) Chip components (2) (B) A high frequency module (3) (C) A radio communication device.

Description

BACKGROUND FIELD OF THE INVENTION

The The present invention relates to a composite multiplexer circuit, which is capable of high frequency signals in several different frequency bands multiplex, as well as a chip component, a high frequency module and a radio communication device using the same.

DESCRIPTION OF THE PRIOR ART

Portable Phones have become more widespread in recent years, the function of portable phones and their associated Services have been improved.

It is a portable multi-band phone as a novel portable phone been proposed. Unlike traditional portable phones, which only handle a transmitting / receiving system, For example, the multi-band portable telephone is designed to accommodate a plurality of Handling transmit / receive systems. This allows a user to be selective to use any of the transceiver systems that are required for a service area or a purpose is suitable.

at another practical embodiment a receiving system with a novel frequency band (1500 MHz band) like the GPS (Global Positioning System) for position detection added to portable phones Service.

exemplary Here is a short description of the configurations of a portable Telephones operating on the cellular or mobile systems (800MHz band) and GPS based, and a portable phone running on the systems PCS (Personal Communication Services: 1900 MHz band) and GPS based.

Additionally done the short description of the configuration of a portable telephone, that on the systems Cellular / GPS / PCS based on and designed for any of the three transceiver systems from Cellular / GPS / PCS switch.

First is a portable cellular / GPS phone equipped with an antenna multiplexer, the complex signals of two cellular / GPS transceiver systems with different ones Passbands multiplexed by respective multiplexer circuits, each the passage of a high frequency signal in a predetermined frequency band and that the cellular transmitting / receiving system between its transmitting system Tx and switches its receiving system Rx. The phone includes Further, a power amplifier, the the transmission system Tx for cellular forms, a low-noise amplifier, the receiving system Rx for cellular forms, a low-noise amplifier, the a receiving system Rx for GPS forms, and the like.

on the other hand is the portable phone for PCS / GPS equipped with an antenna multiplexer, the complex signals of two transmission / reception systems for PCS / GPS with different passbands by means of respective multiplexer circuits, each multiplexing the pass allow a high-frequency signal in a predetermined frequency band, and the the transceiver system for PCS switches between the transmission system Tx and its receiving system Rx. The Telephone further includes a power amplifier, which the transmission system Tx for PCS forms, a low-noise amplifier, the receiving system Rx for PCS forms, a low-noise amplifier, a receiving system Rx for GPS forms, and the like.

Further is the portable phone for Cellular / GPS / PCS equipped with an antenna multiplexer, the complex signals of three transmitting / receiving systems for cellular / GPS / PCS with different Passbands multiplexed by respective multiplexer circuits, each the passage of a high frequency signal in a predetermined frequency band and the cellular transmitting / receiving system between its transmitting system Tx and its receiving system Rx switches and also the transmitting / receiving system for PCS switches between the transmission system Tx and its receiving system Rx. The phone further includes a power amplifier that supports the Transmission system Tx for cellular forms, a low-noise amplifier, which forms the receiving system Rx for cellular, a power amplifier, the sending system Tx for PCS forms, a low-noise amplifier, the receiving system Rx for PCS forms, a low-noise amplifier, a receiving system Rx for GPS forms, and the like.

In in such a way by means of the aforementioned composite multiplexer circuit Multiplexed reception system Rx for GPS becomes an acoustic Harmonic filter (SAW filter) (Surface Acustic Wave) with a sharp Passing characteristic used to exclusively the passage of a radio frequency receive signal to allow for GPS frequencies.

It is desirable in this case if the multiplexer circuit of the receiving system Rx for GPS in the other frequency bands such as the Cellular system and the PCS system has infinitely high input impedances when viewed from an antenna port of the composite multiplexer circuit. In fact, however, the input impedances in these frequency bands are significantly low.

34 is an impedance map, where the center C of the circle represents a characteristic impedance of 50 Ω. A black spot R represents an input impedance of a single SAW filter, as determined at 800 MHz cellular frequency band, which is lower than the GPS frequency band of interest. A real part of the impedance at the point R on the coordinate circle has substantially a value of 0, whereas an imaginary part thereof has a value of about -0.5. Thus, an absolute value of the impedance is roughly one half of 50 Ω or about 25 Ω. The value of 25 Ω is so small that the composite multiplexer circuit disadvantageously multiplexes the high frequency signals, although it is desired to prevent the high frequency signals from entering the multiplexer circuit of the GPS receiving system Rx. As a result, the high-frequency signal to be flown through the cellular multiplexer circuit has a reduced performance.

Of the previously mentioned short or low absolute value of the impedance can also in another higher one Frequency band such as the 1900 MHz frequency band for PCS.

It It is therefore an object of the invention to provide a composite multiplexer circuit to provide a plurality of multiplexer circuits, the connected in parallel to thereby obtain a possibility, a Variety of frequency bands to multiplex, the composite circuit being capable of in a positive way to prevent the respective multiplexer circuits Penetration signals in the other frequency band or other frequency bands than experience your own band, and be able to avoid that the transmission or transmission losses increase in the individual frequency bands.

It It is another object of the invention to provide a chip component Radio frequency module and a radio communication device to provide the use the aforementioned composite multiplexer circuit, namely for the purpose of achieving low transmission losses and a high reliability.

SHORT SUMMARY THE INVENTION

According to the invention a composite multiplexer circuit comprises a plurality of multiplexer circuits on, which are connected in parallel or connected to thereby an ability to multiplex a plurality of frequency bands thereby characterized in that at least one multiplexer circuit for extracting a frequency band has a matching network, the one Inductor and a capacitor includes, as well as an acoustic Surface acoustic wave filters, which is connected in series to the matching network.

According to this Configuration includes the aforementioned multiplexer circuit Extracting a frequency band the matching network and the serially connected to the matching network surface acoustic wave filters on and can be adjusted so that they are at the other frequency band as the one frequency band has an infinite impedance, and though by selecting a constant for the adaptation network. This inhibits interference with the other Multiplexer circuit for extracting a high-frequency signal in the other frequency band, whereby the leakage or penetration or the loss of electrical power is prevented.

These Composite multiplexer circuitry may preferably have such a relationship set up that the total of real parts of admittances in the individual frequency bands from all Multiplexer circuits, when viewed from a connection point, which is connected to an antenna terminal having the value of 1, whereas the total of imaginary parts of the admittances thereof has the value 0, wherein the admittances by a characteristic Admittance are normalized. As long as this relationship is fulfilled, For example, the composite multiplexer circuit can be provided is designed to cover or fulfill several frequency bands and suffers from lower transmission losses in each of the frequency bands.

The Number of multiple frequency bands can 2, to give an example (as the first and second frequency bands designated). In this case, the multiplexer circuit of a the frequency bands have the matching network and the surface acoustic wave filter.

Alternatively, the number of the plurality of frequency bands may also be, for example, 3 (referred to as the first, second, and third frequency bands in this order). In this case, the multiplexer circuit of the second frequency band may preferably include the matching network and the surface acoustic wave filter. Of the The reason for this is that a band-pass filter that can benefit from a sharp attenuation characteristic of the surface acoustic wave filter is suitable for the multiplexer circuit of the second frequency band.

One specific example of the matching network may be a circuit use a serial capacitor, a parallel capacitor, a serial inductor and a parallel capacitor, arranged from an input side in said order are.

Of the The serial inductor of the matching network may preferably be a Inductance L of 15 nH or less, and a Q value (hereinafter as "Q") of 15 or more, if determined at 800 MHz. By limiting the Inductance L and Q on the above ranges can reduce the transmission loss the multiplexer circuit of interest at its pass frequency be reduced while maintaining the infinite impedances at the other frequencies become.

The The SAW filter can be of the "balanced" or "balanced" type or of the "unbalanced" or "unbalanced" type. In the case of Output type "Balanced" can be the SAW filter for one Case are designed, in which one connected to the back thereof IC of input type "Balanced" is (the input type "Balanced" is from the point of view the noise is more advantageous).

According to one Another aspect of the invention comprises a composite multiplexer circuit a plurality of multiplexer circuits connected in parallel are, creating an ability it aims to multiplex a plurality of frequency bands, thereby characterized in that at least one multiplexer circuit for extracting a frequency band, a high pass filter, an inductor and includes a capacitor and a band rejection filter ("band elimination filter ").

at In this configuration, the composite multiplexer circuit can be provided which is designed to cover several frequency bands or to fulfill, and always connectable, is the composite multiplexer circuit can be made without a switching component like a diode and does not suffer from increased transmission losses. In the case, that a SAW filter backside connected to the composite multiplexer circuit is the composite circuit to be able to reduce static electricity, which is the SAW filter influenced, and to suppress harmonic distortions, and does not require increased Number of components.

It is desirable when the composite multiplexer circuit establishes a relationship, such that the sum total of real parts of admittances in the individual frequency bands of all Multiplexer circuits, as viewed from a connection point which is connected to an antenna terminal, a value of 1, whereas the total of imaginary parts of the admittances thereof has a value of 0, wherein the admittances by a characteristic Admittance are normalized. As long as this relationship is fulfilled, For example, the composite multiplexer circuit can be provided is designed to cover a plurality of frequency bands, and suffers from lower transmission losses in each of the frequency bands.

The Number of multiple frequency bands can 3, to give an example (as a first, a second and a third frequency band).

The Composite multiplexer circuit may have a configuration at the multiplexer circuit of the first frequency band at least has a low-pass filter; wherein the multiplexer circuit of second frequency band, a high pass filter and a band rejection filter having; and wherein the multiplexer circuit of the third frequency band a high pass filter and a matching inductor.

at In an alternative configuration, the multiplexer circuit of the first frequency band have at least one low-pass filter; the Multiplexer circuit of the second frequency band may be a high-pass filter, a band rejection filter and a matching inductor; and the multiplexer circuit of the third frequency band may be a high-pass filter exhibit.

A Chip component according to the invention has a dielectric multilayer substrate on which the individual Component circuits of the aforementioned composite multiplexer circuit are mounted. this makes possible the implementation of a compact and thin composite multiplexer circuit.

According to the invention can compact high frequency module provided with excellent electrical transmission performance which comprises the aforementioned composite multiplexer circuit, and mounted on a surface and / or inside a dielectric multilayer substrate, and wherein either a duplexer or a power amplifier or both are mounted.

Further, a radio communication may be provided direction having the aforementioned high-frequency module, in such a way that it is designed to cover or fulfill a plurality of frequency bands.

Further For example, the composite multiplexer circuit according to the invention can be implemented within a be formed multi-layered substrate, so that the composite multiplexer circuit in a multilayer printed circuit board of a composite radio frequency module recorded, unified with a chip component. this makes possible the implementation of a compact, thin composite multiplexer circuit.

A Such compound multiplexer circuitry may be applied to radio communication devices which are designed to cover multiple frequency bands, including of composite mobile communication terminals, mobile communication devices and the same.

SUMMARY THE DRAWING

1 Fig. 10 is a block diagram showing a composite multiplexer circuit according to the invention;

2 Fig. 10 is a circuit diagram of the above composite multiplexer circuit;

3 Fig. 11 is an admittance map showing admittances in a cellular transmission / reception multiplexer circuit of a composite multiplexer circuit as viewed from a connection point P;

4 is an admittance map showing admittances in a reception multiplexer circuit for GPS of the composite multiplexer circuit as seen from the connection point P;

5 shows a circuit equivalent circuit diagram of the composite multiplexer circuit, namely the equivalent circuit, which is one level higher in the function for reducing higher harmonics, but maintains the multiplexer function of the composite multiplexer circuit as it is;

6 Fig. 10 is a block diagram of a composite multiplexer circuit according to another circuit configuration of the invention;

7 Fig. 10 is a circuit diagram of the above composite multiplexer circuit;

8th Fig. 11 is an admittance map showing admittances in a composite multiplexer circuit GPS receiving system as viewed from a connection point P;

9 is an admittance card which shows admittances in a transmission / reception system for PCS of the composite multiplexer circuit as viewed from the connection point P;

10 FIG. 12 is a graph showing a relationship between the inductance value of a series inductor L of a matching network. FIG 6 and the insertion loss in a second frequency band;

11 FIG. 12 is a graph showing a relationship between Q of the serial inductor L of the matching network. FIG 6 and the insertion loss in the second frequency band;

12 shows an equivalent circuit of the composite multiplexer circuit, wherein the equivalent circuit is increased by one stage in terms of the function for reducing higher harmonics, but maintains the multiplexer function of the composite multiplexer circuit as it is;

13 Fig. 10 is a block diagram showing another example of the composite multiplexer circuit according to the invention;

14 Fig. 10 is a diagram showing an equivalent circuit of the composite multiplexer circuit;

15 Fig. 15 is an admittance map showing admittances in a cellular transmission / reception system of the composite multiplexer circuit as viewed from a connection point P;

16 Fig. 11 is an admittance map showing admittances in a composite multiplexer circuit GPS receiving system as viewed from the connection point P;

17 Fig. 11 is an admittance map showing admittances in a transmission / reception system for PCS of the composite multiplexer circuit as viewed from the connection point P;

18 FIG. 12 is a graph showing a relationship between the inductance value of a serial inductor of a matching network. FIG 6 and the insertion loss in the second frequency band;

19 FIG. 12 is a graph showing a relationship between Q of the serial inductor L of the matching network. FIG 6 and the insertion loss in the second frequency band;

20 FIG. 12 shows an equivalent circuit diagram of the composite multiplexer circuit, the equivalent circuit being one with respect to the function for reducing higher harmonics by one step fe is increased, but maintains the multiplexer function of the composite multiplexer circuit as it is;

21 Fig. 10 is a block diagram showing a configuration of a composite multiplexer circuit according to still another circuit configuration of the invention;

22 Fig. 10 is an equivalent circuit diagram of the above composite multiplexer circuit;

23 is an admittance map showing admittances in a circuit A of the composite multiplexer circuit as viewed from a connection point P;

24 is an admittance map showing admittances in a circuit B of the composite multiplexer circuit viewed from the connection point P;

25 is an admittance map showing admittances in a circuit C of the composite multiplexer circuit as viewed from the connection point P;

26 Fig. 10 is a block diagram showing a configuration of a composite multiplexer circuit according to still another circuit configuration of the invention;

27 shows an equivalent circuit diagram of the composite multiplexer circuit;

28 is an admittance map showing admittances in a circuit D of the composite multiplexer circuit as viewed from a connection point P;

29 is an admittance map showing admittances in a circuit E of the composite multiplexer circuit as viewed from the connection point P;

30 is an admittance map showing admittances in a circuit F of the composite multiplexer circuit as viewed from the connection point P;

31 Fig. 10 is a block diagram showing a configuration of a composite multiplexer circuit which is one stage higher in the function for reducing higher harmonics but maintains the multiplexer function of the composite multiplexer circuit as it is;

32 Figure 4 is a perspective view of an outside composite multiplexer chip component incorporating the composite multiplexer circuit of the invention;

33 Figure 4 is a perspective view of a composite radio frequency module externally receiving therein the composite multiplexer circuit of the invention; and

34 is an impedance map showing an input impedance of a single SAW filter.

DETAILED DESCRIPTION OF THE INVENTION

preferred embodiments The invention will be described below in detail with reference to the enclosed Drawing described.

1 Fig. 10 is a block diagram showing a composite multiplexer circuit according to the invention. 2 Fig. 10 is a circuit diagram of the above composite multiplexer circuit.

The Composite multiplexer circuit has a dual band configuration accordingly two communication systems, for example, the communication system Mobile or cellular (a first frequency band: 800 MHz) and the communication system GPS (a second frequency band: 1500 MHz).

The composite multiplexer circuit comprises: a terminal ANT connected to an antenna; a first connection 1 for the input / output of high frequency signals in the first frequency band; and a second connection 2 for inputting a high-frequency signal in the second frequency band.

A low-pass filter circuit (hereinafter referred to as "LPF") 5 is between the ANT connector and the first connector 1 connected. As it is in 2 shown is the LPF 5 an LC filter with an inductor and a capacitor connected in parallel.

As will be described below, this is the LPF 5 formed by strip lines and the capacitor is formed on some of the individual layers of a multi-layered substrate.

The LPF 5 is designed to attenuate the second frequency band. If the first frequency band of the communication system "Cellular" has higher harmonics such as double frequency waves and triple frequency waves, this is LPF 5 also designed to attenuate such higher harmonics.

On the other hand, there is an adaptation network 6 having an inductor and a capacitor, and a surface acoustic wave filter (SAW filter, "Surface Acustic Wave") 7 serial between the connection ANT and the second connection 2 connected. As it is in 2 is shown assigns the matching network 6 an inductor L and a capacitor C1 inserted serially; and has capacitors C2, C3 each connecting one of the opposite ends of the inductor L and the ground.

The customization network 6 has strip lines formed on some of the individual layers of the multilayered substrate and a capacitor using an interlayer capacitance. However, the matching network may also include a chip component of the inductor or the capacitor, instead of the strip lines or the capacitor formed within the multi-layered substrate.

While the configuration of the SAW filter is not limited thereto, a preferable configuration may be such that comb-type IDT ("inter-digital") electrodes are formed on a substrate, such as a Y-cut LiTaO ₃ crystal 36 ° and X-propagation ("36 ° Y-cut and X-propagation"), a LiNbO ₃ crystal with a Y-cut of 64 ° and an X-propagation, or a LiB ₄ O ₇ crystal with a X-section of 45 ° and a Z-propagation.

The The aforementioned SAW filter may be such a SAW filter for outputting a "Balanced" high frequency signal is supplied with a "Unbalanced" high frequency signal. in the In contrast, the SAW filter may also be a SAW filter that for outputting a signal of the type "Unbalan ced" with a high-frequency signal supplied by the type "Unbalanced".

The aforementioned adaptation network 6 is a circuit necessary for increasing an impedance in the first frequency band of the communication system Cellular between the terminal ANT and the second terminal 2 , which causes most high frequency signals from the ANT terminal to the first terminal 1 flow.

In 2 "Z" represents the impedance of the matching network 6 as a single unit. As described in connection with the "DESCRIPTION OF THE PRIOR ART", the SAW filter provides 7 in the first frequency band of the cellular communication system, such a low impedance is provided that the SAW filter allows the radio frequency signal for the communication system to be cellular from the terminal ANT to the second terminal 2 flows. As a result, the customization network is 6 is added so as to rotate the phase of the impedance in conjunction with the decrease of the frequency while maintaining the second frequency band of the GPS in an adjusted state (as will be described below). Therefore, the impedance in the first frequency band between the terminal ANT and the second terminal 2 are increased, so that prevents the high-frequency signal of the communication system Cellular toward the second port 2 leaks or a part thereof to the second terminal 2 flows.

As a result, the combination is the customization network 6 including the inductor and the capacitor and the SAW filter 7 designed to attenuate the high frequency signal in the frequency band of the communication system Cellular.

Respective admittances in the first frequency band (800 MHz) and the second frequency band (1500 MHz) in a multiplexer circuit for the cellular transmission / reception system can be expressed as follows, the multiplexer circuit being viewed from a connection point P where the composite multiplexer circuit is in divides two branches: Y1a = G1a + jB1a, Y2a = G2a + jB2a.

The positional relationship between these admittances is in an admittance map of 3 shown.

Further, respective admittances in the first frequency band (800 MHz) and the second frequency band (1500 MHz) in a multiplexer circuit for the receiving system for GPS can be expressed as follows, the multiplexer circuit being viewed from the connection point P: Y1b = G1b + jB1b, Y2b = G2b + jB2b.

The positional relationship between these admittances is in an admittance map of 4 shown.

It is possible to obtain a composite multiplexer circuit which exhibits good multiplexing and matching performance when the matching conditions of the composite multiplexer circuit are designed to satisfy the following expressions (1): Gna + Gnb = 1 Bna + Bnb = 0 (n = 1, 2) (1) where "n" represents a number indicating a frequency band;
where "n = 1" means the first frequency band (800 MHz), and
It is to be noted that the value "1" of the above expression (Gna + Gnb) is normalized by a characteristic admittance Y0 (Y0 is defined to be 0.02 S, for example) ).

Next shows 5 an exemplary configuration of a composite multiplexer circuit which is increased by one level in terms of a function for reducing higher harmonics, but maintains a multiplexer function of the composite multiplexer circuit as it is, the latter composite multiplexer circuit with reference to the 1 to 4 is described.

The composite multiplexer circuit of 5 has a configuration in which another serial LPF 10 to the LPF 5 the multiplexer circuit of the composite multiplexer circuit of 2 is added, wherein the multiplexer circuit is responsible for extracting the high frequency signal for the transmission / reception system "cellular".

The low-pass filter may be constructed in a two-stage configuration by adding the LPF 10 whereby an even higher ability is achieved to reduce the higher harmonics, such as double frequency waves and triple frequency waves, in the first frequency band of the "cellular" transmission / reception system.

6 is a block diagram showing another composite multiplexer circuit according to the invention, whereas 7 Fig. 12 is a circuit diagram of the above composite multiplexer circuit.

These Composite multiplexer circuit corresponds to two communication systems, for example, the communication system GPS (the second frequency band: 1500 MHz) and a communication system for PCS (a third frequency band: 1900 MHz).

The composite multiplexer circuit includes: the terminal ANT connected to the antenna; the second connection 2 outputting the high-frequency reception signal in the second frequency band; and a third connection 3 for input / output of a high-frequency transmission / reception signal in the third frequency band.

The customization network 6 comprising the inductor and the capacitors, and the SAW filter 7 are between the ANT connector and the second connector 2 inserted. As it is in 7 shown has the matching network 6 a configuration in which a serial capacitor is connected to the terminal ANT, wherein the serial capacitor, a parallel capacitor, a serial inductor and a parallel capacitor are connected together in the order named.

On the other hand, a high-pass filter (hereinafter referred to as "HPF") 8th between the ANT connector and the third connector 3 connected to the communication system PCS.

The HPF 8th is designed to attenuate the second frequency band of the communication system GPS. While the frequency band of the communication system PCS includes the higher harmonics such as the double frequency waves and the triple frequency waves, the HPF 8th and the parallel inductor 9 also capable of attenuating these higher harmonics.

The customization network 6 has strip lines formed on some of the individual layers of the multilayered substrate and a capacitor using an interlayer capacitance. However, the matching network may also use a chip component of the inductor or capacitor instead of the stripline or capacitor formed within the multi-layered substrate.

The HPF 8th also has strip lines formed within the multilayer substrate and a capacitor using an interlayer capacitance. Alternatively, the HPF 8th use a chip component of the inductor or capacitor, instead of the strip lines or the capacitor, which is formed within the multilayer substrate.

In 7 "Z" represents the impedance of the matching network as a single unit. As described in the context of the "DESCRIPTION OF THE PRIOR ART", the SAW filter provides such a low impedance in the third frequency band of the communication system PCS alone the SAW filter allows the high frequency signal for the communications system PCS to go from the ANT port to the second port 2 licks or penetrates. As a result, the customization network is 6 to thereby rotate the phase of the impedance in conjunction with the increase of the frequency while maintaining the second frequency band of the GPS in the adjusted state. As a result, the impedance in the third frequency band between the terminal ANT and the second terminal 2 increase.

Respective admittances in the second frequency band (1500 MHz) and the third frequency Band (1900 MHz) in the GPS receiving system can be expressed as follows, the GPS receiving system being viewed from a connection point P where the composite multiplexer circuit is divided into two branches: Y2c = G2c + jB2c, Y3c = G3c + jB3c.

The positional relationship between these admittances is in an admittance map of 8th shown.

Respective admittances in the second frequency band (1500 MHz) and the third frequency band (1900 MHz) in the transmission / reception system for PCS can be expressed as follows, wherein the transmission / reception system for PCS is viewed from the connection point P: Y2d = G2d + jB2d, Y3d = G3d + jB3d.

The positional relationship between these admittances is in an admittance map of 9 shown.

It is possible to obtain a composite multiplexer circuit which exhibits good multiplexing and matching performance when the matching conditions in the composite multiplexer circuit are designed to satisfy the following expressions (2): Gnc + Gnd = 1 Bnc + Bnd = 0 (n = 2, 3) (2) where "n" represents a number indicating a frequency band;
where "n = 2" means the second frequency band (1500 MHz), and
It is to be noted that the value "1" of the above expression (Gnc + Gnd) is normalized by the characteristic admittance Y0 (Y0 is defined to be 0.025, for example).

The following are exemplary numerical values of the individual components of the matching network 6 as explained below.

The serial inductor L, which is part of the matching network 6 preferably, it may use an inductor having an inductance of 15 nH or less and a Q of 15 or more when determined at 800 MHz. It should be noted, however, that the value of the serial capacitor C1 is set to 1.0 pF; that the value of the parallel capacitor C2 is set to 0.25 pF; and that the value of the parallel capacitor C3 is set to 2.4 pF.

A relationship between the inductance of the series inductor L and the insertion loss between the terminal ANT at 1.5 GHz and the second terminal 2 is in 10 shown.

In addition, there is a relationship between the aforementioned Q and the insertion loss between the terminal ANT at 1.5 GHz of the GPS receiving system and the second terminal 2 in 11 shown.

10 shows the inductance of the series inductor L on the abscissa and the insertion loss at 1.5 GHz on the ordinate. The graph indicates the relationship that the insertion loss increases as the inductance is increased. Assuming that the in 10 It is understood that the insertion loss shown in FIG. 2 is controlled to be 2.0 dB or less, and the inductance of the series inductor L is best defined to be 15 nH or less.

11 shows the Q of the series inductor L on the abscissa and the insertion loss at 1.5 GHz on the ordinate. The graph indicates the relationship that the insertion loss decreases as Q is increased. Assuming that the insertion loss at 1.5 GHz, as in 11 is controlled to 2.0 dB or less, it is understood that the Q of the series inductor L is best defined to be 15 or more.

As described above, the construction is made such that the inductor and the capacitor for the purpose of adaptation with the SAW filter 7 work together to reduce the throughput loss in the GPS receiving system between the ANT connector and the second connector 2 and to attenuate the high frequency signal in the frequency band of the communication system PCS.

12 FIG. 12 shows an exemplary configuration of a circuit which is one step higher in the function for reducing higher harmonics, but maintains the multiplexer function of the aforementioned composite multiplexer circuit as it is.

The composite multiplexer circuit of 12 has a configuration in which a band rejection filter (hereinafter referred to as "BEF") 10 to the HPF 8th in the composite multiplexer circuit of 6 is added, with the HPF 8th is ready to receive the high frequency signal for the send / receive extraction system for PCS.

By adding the BEF 10 in this way, higher harmonics in the third frequency band of the transmission / reception system for PCS can be reduced, such as double frequency waves and triple frequency waves.

13 FIG. 10 is a block diagram showing a composite multiplexer circuit according to still another configuration of the invention. 14 Fig. 10 is a circuit diagram of the above composite multiplexer circuit.

The Composite multiplexer circuit corresponds to a three-band system, wherein the three communication systems the communication system "Cellular" (the first frequency band: 800 MHz), the communication system GPS (the second frequency band: 1500 MHz) and the communications system PCS (the third frequency band: 1900 MHz).

The composite multiplexer circuit comprises: the terminal ANT connected to the antenna; the first connection 1 for the input / output of the radio frequency transmit / receive signals in the first frequency band; the second connection 2 for the input of the radio frequency received signal in the second frequency band; and the third connection 3 for the input / output of the high-frequency transmission / reception signals in the third frequency band.

Between the connection ANT and the first connection 1 is the low pass filter (hereinafter referred to as "LPF") 5 connected in the 1 and 2 is shown.

As it is in 14 shown is the LPF 5 an LC filter with stripline 5L and a capacitor 5C formed on some of the individual layers of the multi-layered substrate. The LPF 5 is designed to attenuate the frequency bands of the communication system GPS and the communication system PCS. While the frequency band of the cellular communication system includes the higher harmonics, such as the double frequency waves and the triple frequency waves, this is LPF 5 also capable of attenuating such higher harmonics.

Between the ANT connector and the second connector 2 are inserted the customization network 6 that has an inductor 6L and capacitors 6C1 . 6C2 . 6C3 and the SAW filter 7 , The customization network 6 indicates: the serial capacitor 6C1 which is connected to the terminal ANT; the parallel capacitor 6C2 which is connected to the earth; the serial inductor 6L , and the parallel capacitor 6C3 , wherein these components are connected to each other in the order named.

These Components can each have strip lines, or a capacitor within is formed of the multi-layered substrate, or otherwise use a chip component of an inductor or a capacitor.

The customization network 6 is necessary to match the respective impedances in the first frequency band and the third frequency band between the terminal ANT and the second terminal 2 to increase. The network rotates the respective phases of the low impedances in the first frequency band and the third frequency band through the SAW filter 7 alone, thereby increasing these impedances while maintaining the impedance in the second frequency band in the adjusted state.

Respective admittances in the first frequency band (800 MHz), the second frequency band (1500 MHz) and the third frequency band (1900 MHz) in the transmission / reception system for "cellular" can be expressed as follows, wherein the transmission / reception system for cellular from a connection point P is considered, in which the composite multiplexer circuit is divided into three branches: Y1a = G1a + jB1a, Y2a = G2a + jB2a, Y3a = G3a + jB3a.

The positional relationship between these admittances is in an admittance map of 15 shown.

Further, respective admittances in the first frequency band (800 MHz), the second frequency band (1500 MHz) and the third frequency band (1900 MHz) in the receiving system for GPS can be expressed as follows, the receiving system for GPS being viewed from the connection point P : Y1b = G1b + jB1b, Y2b = G2b + jB2b; Y3b = G3b + jB3b.

The positional relationship between these admittances is in an admittance map of 16 shown.

Further, respective admittances in the first frequency band (800 MHz), the second frequency band (1500 MHz) and the third frequency band (1900 MHz) in the transmission / reception system for PCS can be expressed as follows, wherein the transmission / reception system for PCS from the connection point P is considered from: Y1c = G1c + jB1c, Y2c = G2c + jB2c; Y3c = G3c + jB3c.

The positional relationship between these admittances is in an admittance map of 17 shown.

It is possible to obtain a composite multiplexer circuit which exhibits good matching performance when the matching conditions in the composite multiplexer circuit are designed to satisfy the following expressions (3): Gna + Gnb + Gnc = 1 Bna + Bnb + Bnc = 0 (n = 1, 2, 3) (3) where "n" represents a number indicating a frequency band. The above expressions must hold for each of the cases n = 1, 2, 3. It should be noted that the value "1" of the above expression is normalized by a characteristic admittance Y0 (Y0 may be defined as 0.02S, for example).

Next are exemplary numerical values of the matching network 6 explains as given below.

The serial inductor 6L , which is part of the adaptation network 6 may preferably use an inductor having an inductance of 15 nH or less and a Q of 15 or more, determined at 800 MHz, the matching network having a configuration which is in terms of the insertion loss between the terminal ANT at 1, 5 GHz and the second connection 2 is reduced. It should be noted, however, that the value of the serial capacitor C1 is set to 1.0 pF; that the value of the parallel capacitor C2 is set to 0.25 pF; and that the value of the parallel capacitor C3 is set to 2.4 pF.

A relationship between the inductance and the insertion loss between the terminal ANT and the second terminal 2 is in 18 shown. A relationship between the value of Q and the insertion loss between the ANT port and the second port 2 is in 19 shown.

18 shows the inductance of the series inductor 6L on the abscissa and the insertion loss at 1.5 GHz on the ordinate. The graph indicates the relationship that the insertion loss increases as the inductance is increased. Assuming that the in 18 is shown controlled to a value of 2.0 dB or less, it is understood that the inductance of the series inductor 6L best defined to be 15 nH or less.

19 shows the value of Q of the serial inductor 6L on the abscissa and the insertion loss at 1.5 GHz on the ordinate. The graph indicates the relationship that as the value of Q is increased, the insertion loss decreases accordingly. Assuming that the insertion loss at 1.5 GHz, as in 19 is controlled to a value of 2.0 dB or less, it is understood that the value of Q of the series inductor 6L is best defined to be 15 or more.

That between the connection ANT and the second connection 2 inserted SAW filters 7 For example, since the balanced output is characterized by high resistance to high frequency noise, the high frequency signal output from the SAW filter facilitates the use of a SAW filter supplied with an unbalanced high frequency signal the extraction of information data.

The customization network 6 works with the SAW filter 7 together to attenuate the frequency bands of the communication system PCS and the communication system PCS.

Between the connection ANT and the third connection 3 is the high-pass filter (hereinafter referred to as "HPF") 8th educated.

The HPF 8th also has strip lines and a capacitor formed within the multilayered substrate.

The HPF 8th is designed to attenuate the frequency bands of the communication system Cellular and the communication system GPS. If the frequency band of the communication system Cellular includes the higher harmonics such as the double frequency waves and the triple frequency waves, even such higher harmonics can be attenuated.

20 shows a configuration of a Ver multiplexer circuit which is one step higher in the higher harmonic reduction function but maintains the multiplexer function of the so-called composite multiplexer circuit as it is.

The composite multiplexer circuit of 20 is formed by adding the following circuits to the composite multiplexer circuit of FIG 14 to be added. That is, the LPF 5 , which forms part of the circuit for extracting the high-frequency signal in the first frequency band, becomes an LPF 11 added, whereas the HPF 8th forming part of the circuit for extracting the high frequency signal in the third frequency band, a band rejection filter (hereinafter referred to as "BEF") 12 will be added.

By adding the LPF 11 and the BEF 12 in this way, the first frequency band in the higher harmonics including the double frequency waves and the triple frequency waves can be reduced while the third frequency band in the higher harmonics including the double frequency waves and the triple frequency waves can be reduced.

When next becomes an embodiment of the invention, which is a filter of an LC device instead of the SAW filter used in detail with reference to the accompanying drawings described.

21 FIG. 10 is a block diagram of a configuration of a composite multiplexer circuit according to still another circuit configuration of the invention. FIG. 22 shows an equivalent circuit diagram of the above composite multiplexer circuit.

These Composite multiplexer circuit corresponds to three bands, the three communication systems the communication system Cellular (the first frequency band: 800 MHz), the communication system GPS (the second frequency band: 1500 MHz); and the communication system PCS (the third frequency band: 1900 MHz).

It It should be noted that the first, the second and the third frequency band arbitrary frequency bands are applicable, including frequency bands GSM, GPS, DCS, Cellular, PCS, W-CDMA, and like.

The composite multiplexer circuit comprises: the terminal ANT connected to the antenna, the first terminal 1 for input / output of the transmission / reception high-frequency signals in the first frequency band; the second connection 2 for inputting the reception radio-frequency signals in the second frequency band; and the third connection 3 for input / output of the transmission / reception high frequency signals in the third frequency band.

The low pass filter circuit (hereinafter referred to as "LPF") 5 is between the ANT connector and the first connector 1 connected. A circuit used by the LPF 5 is formed, is represented by a reference numeral "A".

The LPF 5 is an LC filter with strip lines and a capacitor formed on some of the individual layers of the multilayer substrate. The LPF 5 is designed to attenuate the frequency bands of the communication system GPS and the communication system PCS. When the frequency band of the cellular communication system includes the higher harmonics including the double frequency waves and the triple frequency waves, the filter is also capable of attenuating such higher harmonics.

Between the ANT connector and the second connector 2 are a high pass filter circuit (hereinafter referred to as "HPF") 7a and a notch filter circuit (hereinafter referred to as "BEF") 7b connected. The HPF 7a and the BEF 7b Each has strip lines and a capacitor formed on some of the individual layers in the multilayer substrate. One through the HPF 7a and the BEF 7b formed circuit is represented by a reference numeral "B".

The HPF 7a is designed to attenuate the frequency band of the communication system Cellular, whereas the BEF 7b is designed to attenuate the frequency band of the communication system PCS.

Furthermore, the HPF dampens 7a the lower frequencies of the frequency band and the HPF are therefore also able to attenuate static electricity (up to 300 MHz) affecting a SAW filter located at the back of the second port 2 can be connected. As a result, the HPF 7a also play a role in the protection of the SAW filter, which is connected to the back stage of the circuit.

The BEF 7b behind the HPF 7a may also be configured to play a role in reducing the higher harmonics in the communication system PCS by providing a length between an input terminal of the rear of the second terminal 2 connected SAW filter and the ANT terminal to λ (2n-1) / 4 of the frequency band of the communication system PCS is defined (λ: wavelength, n: natural number).

On the other hand, the HPF 8th between the ANT connector and the third connector 3 educated. This HPF 8th also has strip lines and a capacitor formed within the multilayer substrate. One through the HPF 8th formed circuit is represented by a reference character "C".

The HPF 8th is designed to attenuate the frequency bands of the communication system Cellular and the communication system GPS. This construction is also designed to attenuate the higher harmonics including the double frequency waves and the triple frequency waves included in the frequency band of the communication system PCS.

Respective admittances in the first frequency band (800 MHz), the second frequency band (1500 MHz) and the third frequency band (1900 MHz) in the circuit A can be expressed as follows, wherein the circuit A is viewed from a connection point P, in which the Composite multiplexer circuit is divided into three branches: Y1d = G1d + jB1d, Y2d = G2d + jB2d; Y3d = G3d + jB3d.

The positional relationship between these admittances is in an admittance map in 23 shown.

Further, respective admittances in the first frequency band (800 MHz), the second frequency band (1500 MHz) and the third frequency band (1900 MHz) in the circuit B can be expressed as follows, the circuit B being viewed from the connection point P: Y1e = G1e + jB1e, Y2e = G2e + jB2e; Y3e = G3e + jB3e.

The positional relationship between these admittances is in an admittance map in 24 shown.

Further, respective admittances in the first frequency band (800 mHz), the second frequency band (1500 MHz) and the third frequency band (1900 MHz) in the circuit C can be expressed as follows, the circuit C being viewed from the connection point P: Y1f = G1f + jB1f, Y2f = G2f + jB2f; Y3f = G3f + jB3f.

The positional relationship between these admittances is in an admittance map of 25 shown.

It is possible to obtain a composite multiplexer circuit which exhibits good matching performance when the matching conditions in the above circuits A, B and C are made to satisfy the following expressions (4): Gnd + Gne + Gnf = 1 Bnd + Bne + Bnf = 0 (n = 1, 2, 3) (4) The above expressions must hold for each of the cases n = 1, 2, 3. It should be noted that the value "1" of the above expression is normalized by a characteristic admittance Y0 For example, Y0 is defined as 0.02S.

26 Fig. 10 is a block diagram showing a configuration of a composite multiplexer circuit according to still another circuit configuration of the invention. 27 shows an equivalent circuit diagram of the above composite multiplexer circuit.

These Composite multiplexer circuit corresponds to three bands, the three communication systems the communication system Cellular (the first frequency band: 800 MHz), the communication system GPS (the second frequency band: 1500 MHz), and the PCS communication system (the third frequency band: 1900 MHz).

The composite multiplexer circuit comprises: the terminal ANT connected to the antenna; the first connection 1 for input / output of the transmission / reception high-frequency signals in the first frequency band; the second connection 2 for inputting the reception radio-frequency signal in the second frequency band; and the third connection 3 for input / output of the transmission / reception high-frequency signals in the third frequency band.

Between the connection ANT and the first connection 1 is the LPF 5 connected in the 26 and 27 is shown. One by the LPF 5 formed circuit is represented by a reference character "D".

The LPF 5 is an LC filter with strip lines and a capacitor formed on some of the individual layers of the multilayer substrate. The LPF 5 is designed to Fre attenuation bands of the communication system GPS and the communication system PCS. When the frequency band of the cellular communication system includes the higher harmonics including the double frequency waves and the triple frequency waves, the filter is also capable of attenuating such higher harmonics.

Between the ANT connector and the second connector 2 are the HPF 7a and the BEF 7b connected. The parallel inductor 9 , the HPF 7a and the BEF 7b Each has strip lines or a capacitor which is formed on some of the individual layers of the multilayer substrate. One through the HPF 7a and the BEF 7b formed circuit is represented by a reference numeral "E".

The HPF 7a is designed to attenuate the frequency band of the communication system Cellular, whereas the BEF 7b is designed to attenuate the frequency band of the communication system PCS.

In addition, the HPF dampens 7a the lower frequencies of the frequency band and the HPF are therefore also able to attenuate static electricity (up to 300 MHz) affecting a SAW filter located at the back of the second port 2 can be connected. As a result, the HPF 7a also play a role in protecting the SAW filter, which is connected to the back of the circuit.

That behind the HPF 7a inserted BEF 7b may also be configured to play a role in reducing the higher harmonics in the communications system PCS by providing a length between an input port of the SAW filter located at the back of the second port 2 is connected, and the terminal ANT is defined as λ (2n-1) / 4 of the frequency band of the communication system PCS (λ: wavelength, n: natural number).

On the other hand, between the ANT connection and the third connection 3 the HPF 8th connected. This HPF 8th also has strip lines and a capacitor formed inside the multilayer substrate. One from the HPF 8th formed circuit is represented by a reference character "F".

The HPF 8th is designed to attenuate the frequency bands of the communication system Cellular and the communication system GPS. The construction is also designed to attenuate the higher harmonics including the double frequency waves and the triple frequency waves included in the frequency band of the communication system PCS.

Hereinafter, respective admittances in the first frequency band (800 MHz), the second frequency band (1500 MHz) and the third frequency band (1900 MHz) in the circuit D can be expressed as follows, the circuit D being viewed from a connection point P, in which the composite multiplexer circuit is divided into three branches: Y1g = G1g + jB1g, Y2g = G2g + jB2g; Y3g = G3g + jB3g.

The positional relationship between these admittances is in an admittance map of 28 shown.

Further, respective admittances in the first frequency band (800 MHz), the second frequency band (1500 MHz) and the third frequency band (1900 MHz) in the circuit E can be expressed as follows, the circuit E being viewed from the connection point P: Y1h = G1h + jB1h, Y2h = G2h + jB2h; Y3h = G3h + jB3h.

The positional relationship between these admittances is in an admittance map of 29 shown.

Further, respective admittances in the first frequency band (800 MHz), the second frequency band (1500 MHz) and the third frequency band (1900 MHz) in the circuit F can be expressed as follows, the circuit F being viewed from the connection point P: Y1i = G1i + jB1i, Y2i = G2i + jB2i; Y3i = G3i + jB3i.

The positional relationship between these admittances is in an admittance map of 30 shown.

It is possible to obtain a composite multiplexer circuit which exhibits good matching performance when the matching conditions in the above circuits D, E and F are so designed to meet the following expressions (5): Gng + Gnh + Gni = 1 Bng + Bnh + Bni = 0 (n = 1, 2, 3) (5) where "n" represents a number indicating a frequency band The above expressions must hold for each of the cases n = 1, 2, 3.

31 FIG. 12 shows an exemplary configuration of a composite multiplexer circuit which is increased by one stage in the function for reducing higher harmonics, but maintains the multiplexer function of the aforementioned composite multiplexer circuit as it is.

The composite multiplexer circuit of 31 is formed by adding the following circuits to the composite multiplexer circuit 22 , That is, the LPF 5 that forms the circuit A for extracting the high-frequency signal in the first frequency band is an LPF 51 whereas the circuit C for extracting the high-frequency signal in the third frequency band has a BEF 52 is added.

By adding the LPF 51 and the BEF 52 In this way, higher harmonics including the double frequency waves and the triple frequency waves can be reduced in the first frequency band, whereas the higher harmonics including the double frequency waves and the triple frequency waves in the third frequency band can be reduced.

A composite multiplexer chip component 30 According to the above circuit configuration of the invention is in a perspective view from the outside of 32 shown.

As shown in the figure, the composite multiplexer chip component 30 a dielectric multilayer substrate 31 , a SAW filter chip 32 and an adaptation network 6 on, which are mounted on the substrate. The customization network 6 has an LC chip component 33 and stripline, an inductor, and a capacitor inside the dielectric multilayer substrate 31 formed by laminating a plurality of dielectric layers.

each The dielectric layers may be formed as follows, for example be: using a conductive material Like a copper foil, a conductor pattern becomes an organic one dielectric substrate such as glass epoxy resin. The resulting organic dielectric layers are laminated and subsequently thermally cured. In an alternative method, inorganic dielectric Layers such as those made of ceramic material with different conductor patterns are formed and simultaneously laminated and sintered.

The Use of the ceramic material provides in particular a thinner dielectric Layer, and that is because the dielectric ceramic material usually a dielectric constant of 9 to 25, a value higher than that of the resin substrate. Therefore, you can the circuit components accommodated in the dielectric layers be formed smaller, and further, a distance between the components are also reduced.

It is particularly preferred, a ceramic material such as glass ceramic to be used, which can be sintered at low temperatures. This is because such a ceramic material allows the conductor pattern of a low resistance material is formed, such as copper, silver or the like.

each of the dielectric layers is in the vertical direction with a Through-hole conductor formed, the vertical connection the circuits with each other is necessary, wherein the through-hole conductor extends through a plurality of dielectric layers. Of the Through hole conductor can be formed by plating a metal on an inner surface of the through hole extending through the dielectric layers extends, or by filling a conductive paste in the through hole.

As it is in 32 are shown are electrodes 34 for connecting the conductor pattern to the environment at an end face or a back side of the dielectric multi-layered substrate 31 provided, which is formed as described above. Thus, the composite multiplexer chip component becomes 30 finally formed, which includes the composite multiplexer circuit.

33 is an external perspective view showing a composite high frequency module 90 showing therein the composite multiplexer circuit of the invention.

On a multilayer printed circuit board 95 The module incorporates passive and active components, including a SAW filter 96 and an LC chip component 97 which form the composite multiplexer circuit, and are also a SAW duplexer 91 , a power amplifier 92 , one SAW hand-pass filter 93 and the like mounted. A part of an inductor or a capacitor or the entire body thereof, which forms a matching circuit between the individual components, is in the multilayer printed circuit board 95 integrated or formed therein.

In 33 is a variety of connection electrodes 94 on a back side of the multilayer printed circuit board 95 educated. The connection electrodes 94 include such electrodes serving as input / output terminals of the composite multiplexer circuit and the composite high-frequency module.

One such high frequency module can be used in radio communication devices like mobile radio access devices with several bands be used.

Although the embodiments of the invention have been fully described, it is to be understood that the practice of the invention is not limited to the foregoing embodiments. For example, between the antenna terminal and the ground in the 6 . 7 . 12 . 13 . 14 . 20 . 21 . 22 . 26 . 27 or 31 a parallel phase matching inductor will be installed. However, if such an inductor is installed, a useless low frequency notch may be generated in the circuit incorporating the SAW filter. When such a low frequency notch is generated, it is preferable not to install the parallel phase matching inductor. Although the systems of cellular, PCS and GPS are shown as the communication systems of the individual transceiver systems, it should be noted that these are merely examples of the communication systems or frequency bands. The invention is applicable to any frequency band such as GSM, GPS, DCS (Digital Cellular System), Cellular, PCS, W-CDMA and the like.

Claims (23)

A composite multiplexer circuit having a plurality of multiplexer circuits connected in parallel to thereby provide an ability to multiplex a plurality of frequency bands, wherein at least one multiplexer circuit for extracting a frequency band comprises a matching network (Fig. 6 ) with an inductor (L) and a capacitor (C) and a surface acoustic wave filter ( 7 ) connected in series with the matching network ( 6 ) connected is. A composite multiplexer circuit according to claim 1, wherein a relationship is established, such that the grand total of Realizing admittances in the individual frequency bands of all multiplexer circuits, viewed from a connection point (P) connected to an antenna port (ANT) has a value of 1, whereas the grand total of imaginary parts of the admittances thereof is 0, wherein the admittances by a characteristic admittance (Y0) are normalized. Composite multiplexer circuit according to claim 1 or 2, wherein the plurality of frequency bands include a first frequency band and a second frequency band, the higher lies as the first frequency band, and wherein the multiplexer circuits a multiplexer circuit for extracting the first frequency band and a multiplexer circuit for extracting the second frequency band exhibit. The composite multiplexer circuit of claim 3, wherein respective admittances in the first frequency band and the second frequency band in the multiplexer circuit of the first frequency band can be expressed by: Y1a = G1a + jB1a, Y2a = G2a + jB2a, whereas respective admittances in the first frequency band and the second frequency band in the multiplexer circuit of the second frequency band can be expressed as: Y1b = G1b + jB1b, Y2b = G2b + jB2b, where "j" represents an imaginary unit and "n" represents a frequency band, and wherein the composite multiplexer circuits are designed to satisfy the following expressions: Gna + Gnb = 1 Bna + Bnb = 0 (n = 1, 2). Composite multiplexer circuit according to claim 3 or 4, wherein the multiplexer circuit of the first frequency band comprises a circuit with a low-pass filter ( 5 ) and wherein the multiplexer circuit of the second frequency band is the matching network ( 6 ) and the surface acoustic wave filter ( 7 ) having. A composite multiplexer circuit according to claim 3 or 4, wherein the multiplexer circuit of the first frequency band comprises the matching network ( 6 ) and the surface acoustic wave filter ( 7 ) having, whereas the multiplexer circuit of the second frequency band comprises a circuit with a high-pass filter ( 8th ). Composite multiplexer circuit according to claim 1 or 2, wherein the plurality of frequency bands a first frequency band, a second frequency band that is higher as the first frequency band, and a third frequency band, the higher is or is higher as the second frequency band, and wherein the multiplexer circuits a multiplexer circuit for extracting the first frequency band, a multiplexer circuit for extracting the second frequency band and a multiplexer circuit for extracting the third frequency band. A composite multiplexer circuit according to claim 6 or 7, wherein respective admittances in the first frequency band, the second frequency band and the third frequency band in the multiplexer circuit of the first frequency band can be expressed as: Y1a = G1a + jB1a, Y2a = G2a + jB2a; Y3a = G3a + jB3a, wherein respective admittances in the first frequency band, the second frequency band and the third frequency band in the multiplexer circuit of the second frequency band can be expressed as: Y1b = G1b + jB1b, Y2b = G2b + jB2b; Y3b = G3b + jB3b, and wherein respective admits in the first frequency band, the second frequency band and the third frequency band in the multiplexer circuit of the third frequency band can be expressed as: Y1c = G1c + jB1c, Y2c = G2c + jB2c; Y3c = G3c + jB3c, where "j" represents an imaginary unit and where "n" represents a frequency band, and wherein the composite multiplexer circuits are arranged to satisfy the following expressions: Gna + Gnb + Gnc = 1 Bna + Bnb + Bnc = 0 (n = 1, 2, 3). A composite multiplexer circuit according to claim 7 or 8, wherein the multiplexer circuit of the second frequency band comprises the matching network ( 6 ) and the surface acoustic wave filter ( 7 ) having. A composite multiplexer circuit according to claim 9, wherein the multiplexer circuit of the first frequency band comprises a circuit having a low-pass filter ( 5 ), whereas the multiplexer circuit of the third frequency band has a circuit with a high-pass filter ( 8th ). Composite multiplexer circuit according to one of claims 1 to 11, wherein the matching network is a serial capacitor, a parallel capacitor, a serial inductor and a parallel Capacitor, which from an input side in said Order are arranged. The composite multiplexer circuit of claim 11, wherein the serial inductor of the matching network ( 6 ) has an inductance (L) of 15 nH or less and a value of Q of 15 or more, determined at 800 MHz. Composite multiplexer circuit according to one of claims 1 to 12, wherein the SAW filter of the symmetric output type or from is unbalanced output type. A composite multiplexer circuit having a plurality of multiplexer circuits connected in parallel to provide an ability to multiplex a plurality of frequency bands, wherein at least one multiplexer circuit for extracting a frequency band comprises a high pass filter (Fig. 8th ), which includes an inductor and a capacitor, and a band rejection filter ( 12 ) having. A composite multiplexer circuit according to claim 14, wherein a relationship is established, such that the grand total of Realizing admittances in the individual frequency bands of all multiplexer circuits, seen from a connection point (P), with an antenna terminal (ANT), has a value of 1, whereas the total of imaginary parts of the admittances thereof has a value of 0, wherein the admittances by a characteristic Admittance are normalized. A composite multiplexer circuit according to claim 14 or 15, wherein the plurality of frequency bands comprise a first frequency band, a second frequency band higher than the first frequency band, and a third frequency band higher than the second frequency band, and wherein the multiplexer circuits comprise a multiplexer circuit for extracting the frequency band first frequency band , a multiplexer circuit for extracting the second frequency band and a multiplexer circuit for extracting the third frequency band. A composite multiplexer circuit according to claim 16, wherein the multiplexer circuit of the first frequency band at least one Low-pass filter, wherein the multiplexer scarf tion of the second Frequency band has a high-pass filter and a band stop filter, and wherein the multiplexer circuit of the third frequency band High pass filter has. A composite multiplexer circuit according to claim 16 or 17, wherein respective admittances in the first frequency band, the second frequency band and the third frequency band in the multiplexer circuit of the first frequency band can be expressed as: Y1d = G1d + jB1d, Y2d = G2d + jB2d; Y3d = G3d + jB3d, wherein respective admittances in the first frequency band, the second frequency band and the third frequency band in the multiplexer circuit of the second frequency band can be expressed as: Y1e = G1e + jB1e, Y2e = G2e + jB2e; Y3e = G3e + jB3e, and wherein respective admittances in the first frequency band, the second frequency band and the third frequency band in the multiplexer circuit of the third frequency band can be expressed as: Y1f = G1f + jB1f, Y2f = G2f + jB2f; Y3f = G3f + jB3f, and wherein the composite multiplexer circuits are arranged to satisfy the following expressions: Gnd + Gne + Gnf = 1 Bnd + Bne + Bnf = 0 (n = 1, 2, 3). A composite multiplexer circuit according to claim 16, wherein the multiplexer circuit of the first frequency band at least one Low pass filter, wherein the multiplexer circuit of the second Frequency band has a high-pass filter and a band stop filter, and wherein the multiplexer circuit of the third frequency band High pass filter has. A composite multiplexer circuit according to claim 16 or 19, wherein respective admittances in the first frequency band, the second frequency band and the third frequency band in the multiplexer circuit of the first frequency band can be expressed as: Y1g = G1g + jB1g, Y2g = G2g + jB2g; Y3g = G3g + jB3g, wherein respective admittances in the first frequency band, the second frequency band and the third frequency band in the multiplexer circuit of the second frequency band can be expressed as: Y1h = G1h + jB1h, Y2h = G2h + jB2h; Y3h = G3h + jB3h, and wherein respective admittances in the first frequency band, the second frequency band and the third frequency band in the multiplexer circuit of the third frequency band can be expressed as: Y1i = G1i + jB1i, Y2i = G2i + jB2i; Y3i = G3i + jB3i, and wherein the composite multiplexer circuits are arranged to satisfy the following expressions: Gng + Gnh + Gni = 1 Bng + Bnh + Bni = 0 (n = 1, 2, 3). Chip component ( 30 ) with a dielectric multilayer substrate ( 31 ; 95 ) to which the individual multiplexer circuits included in the composite multiplexer circuit according to any one of claims 1 to 20 are mounted. High-frequency module ( 90 ) with the composite multiplexer circuit according to one of claims 1 to 20, mounted on a surface and / or inside a dielectric multi-layered substrate ( 31 ; 95 ), with either a duplexer ( 91 ) and / or a power amplifier ( 92 ) is mounted. Radio communication device with the high-frequency module ( 90 ) according to claim 22.